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PIC18F8620 Datasheet

  • PIC18F8620

  • 64/80-Pin High-Performance,256 Kbit to 1 Mbit Enhanced Flash...

  • 380頁

  • Microchip   Microchip

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PIC18F6520/8520/6620/8620/6720/8720
9.1
INTCON Registers
Note:
The INTCON registers are readable and writable
registers, which contain various enable, priority and
flag bits.
Interrupt flag bits are set when an interrupt
condition occurs, regardless of the state of
its corresponding enable bit or the global
enable bit. User software should ensure
the appropriate interrupt flag bits are clear
prior to enabling an interrupt. This feature
allows for software polling.
REGISTER 9-1:
INTCON REGISTER
R/W-0
GIE/GIEH
bit 7
R/W-0
PEIE/GIEL
R/W-0
TMR0IE
R/W-0
INT0IE
R/W-0
RBIE
R/W-0
TMR0IF
R/W-0
INT0IF
R/W-x
RBIF
bit 0
bit 7
GIE/GIEH:
Global Interrupt Enable bit
When IPEN (RCON<7>) =
0:
1
= Enables all unmasked interrupts
0
= Disables all interrupts
When IPEN (RCON<7>) =
1:
1
= Enables all high priority interrupts
0
= Disables all interrupts
PEIE/GIEL:
Peripheral Interrupt Enable bit
When IPEN (RCON<7>) =
0:
1
= Enables all unmasked peripheral interrupts
0
= Disables all peripheral interrupts
When IPEN (RCON<7>) =
1:
1
= Enables all low priority peripheral interrupts
0
= Disables all low priority peripheral interrupts
TMR0IE:
TMR0 Overflow Interrupt Enable bit
1
= Enables the TMR0 overflow interrupt
0
= Disables the TMR0 overflow interrupt
INT0IE:
INT0 External Interrupt Enable bit
1
= Enables the INT0 external interrupt
0
= Disables the INT0 external interrupt
RBIE:
RB Port Change Interrupt Enable bit
1
= Enables the RB port change interrupt
0
= Disables the RB port change interrupt
TMR0IF:
TMR0 Overflow Interrupt Flag bit
1
= TMR0 register has overflowed (must be cleared in software)
0
= TMR0 register did not overflow
INT0IF:
INT0 External Interrupt Flag bit
1
= The INT0 external interrupt occurred (must be cleared in software)
0
= The INT0 external interrupt did not occur
RBIF:
RB Port Change Interrupt Flag bit
1
= At least one of the RB7:RB4 pins changed state (must be cleared in software)
0
= None of the RB7:RB4 pins have changed state
Note:
A mismatch condition will continue to set this bit. Reading PORTB will end the
mismatch condition and allow the bit to be cleared.
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
鈥?鈥?= Bit is set
U = Unimplemented bit, read as 鈥?鈥?/div>
鈥?鈥?= Bit is cleared
x = Bit is unknown
錚?/div>
2004 Microchip Technology Inc.
DS39609B-page 89

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